Allenby, R.B.J.T. <br/><br/>
How to count    an introduction to combinatorics 
R.B.J.T. Allenby and Alan Slomson 
 - 2nd ed. 
 - Boca ration  CRC  2011 
 - xv, 430p. 
 - (Discrete mathematics and its applications) .
<br/><br/><label>ISBN: </label>9781420082609 
<br/><br/><label>Subjects--Index Terms: </label>Combinational analysis Permutations and combinations Inclusion - exclusion principle 
<br/><br/><label>Universal Decimal Class. No.: </label>519.1  / ALL